Navegando por Autor "Queiroz, Danielly de Moura Borba"

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    Classificação de imagens de textura geradas por gráficos de recorrências no problema de pessoas sofrendo ataques epiléticos
    (2019) Queiroz, Danielly de Moura Borba; Macário Filho, Valmir; http://lattes.cnpq.br/4346898674852080; http://lattes.cnpq.br/7461629772562910
    Epilepsy is a neurological condition characterized by the occurrence of epileptic seizuresthat recur in variations. These seizures are clinical manifestations of an abnormal dis-charge of neurons, which are cells that make up the brain. Some features make earlydiagnosis of epilepsy a major challenge, even for the most experienced clinicians. Asmedical aid, there are tests such as electroencephalogram (EEG) represented by timeseries widely used in the diagnosis of epilepsy. Time series are present in various areasof study, such as medicine, biology, economics, among others. Your graphics exposehidden patterns and alter data such as texture patterns as well as those that can beused by texture extraction methods. In addition, there are several tools for extractingtime series information, one of which is the hit image, which is currently used to verifythe change of an unsigned pattern. This paper presents a study of texture descriptorsand classifiers in images of healthy and epileptic people generated by recurrence im-ages. The texture descriptors using this study were: Local Binary Models (LBP), LocalPhase Quantification (LPQ) and Gabor Filter Bank. To the best of our knowledge, nostudy has yet been performed, applying these descriptors to base recurrence imagesused in this work. The evaluation is performed through the average hit, precision, recalland f-measure rate resulting from the following classifiers: textit Random Forest, andtextit Support Vector Machine (SVM). The experiments showed that the SVM classi-fier using the LPQ descriptor showed promising results, obtaining 92.1% hit, recall andf-measure mean and for accuracy obtained 92.26%.